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Monoprice

Monoprice 100076 SCSI 68 Female to IDC 50 Female Adapter

★★★★★4.8 (10 reviews)

A compact SCSI adapter bridging HPDB 68-pin and IDC 50-pin interfaces for legacy device connectivity.

$15.99*
✓ In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Monoprice 100076 is a passive SCSI adapter designed to connect an HPDB 68-pin (High-Density) female interface to an IDC 50-pin female interface. This allows users to bridge the gap between 16-bit Wide SCSI devices and peripherals that use the older 8-bit Narrow SCSI standard, or simply to adapt cabling between the two connector types within the same system. The HPDB 68 connector features tightly spaced parallel 34-pin rows commonly found on Wide SCSI-2 and SCSI-3 devices, while the IDC 50 connector uses the wider 25-pin row layout typical of internal SCSI ribbon cables.

As a purely passive adapter, the 100076 requires no drivers, software, or external power — it handles the physical pin conversion and nothing more. This simplicity makes it easy to install in legacy server environments, older workstations, or industrial equipment where SCSI devices of different generations need to coexist. Because both ends are female connectors, users will need cables with male terminations on each side. While SCSI technology has largely been superseded by SAS and other modern interfaces, this adapter remains a practical and affordable tool for anyone maintaining or refurbishing legacy SCSI infrastructure.

Key Features

The IDC 50 connector is a 50-pin 8-bit SCSI "header" connector used for internal-type ribbon cables

It is also known as the "Alterative 2" connector

It has parallel 25-pin rows and resembles an older ATA/IDE drive cable except that it is wider and has more pins

The HPDB 68 connector is a 68-pin 16-bit SCSI-2 connector used for both internal and external connections (plastic for internal and metal for external)

It has parallel 34-pin rows but has the pins much closer together and is therefore narrower than the IDC 50 connector

Specifications

Brand
Monoprice
Model
100076
Connector 1
SCSI HPDB 68-pin Female
Connector 2
IDC 50-pin Female
Type
Passive Adapter
Power Required
None

Pros & Cons

👍 Pros

  • Provides a straightforward physical bridge between HPDB 68-pin and IDC 50-pin SCSI interfaces without any software or drivers.
  • Compact form factor adds minimal bulk to internal cable runs.
  • Passive design requires no external power, keeping installation simple.
  • Monoprice pricing makes it an affordable solution for legacy SCSI connectivity needs.

👎 Cons

  • Both connectors are female, so you need male-terminated cables on both sides, which may require additional adapters.
  • Connecting 16-bit Wide SCSI devices to an 8-bit Narrow bus through this adapter reduces data width and throughput.
  • Only useful for legacy SCSI equipment, which limits its relevance to users maintaining older hardware.
  • Does not include any cables — only the adapter itself is provided.

Frequently Asked Questions

This adapter has both an HPDB 68 female connector and an IDC 50 female connector, so it bridges the two interfaces in either direction depending on your cable setup. You will need male-terminated cables on both sides.
It physically adapts the connectors, but connecting a 16-bit Wide SCSI device to an 8-bit Narrow bus means the device will operate at the narrower 8-bit data width, which may reduce throughput.
The IDC 50 connector is typically used for internal ribbon cable connections, while the HPDB 68 can be used for either internal or external connections. This adapter is most commonly used for internal setups.
No, this is a passive physical adapter that requires no drivers, software, or power — it simply converts the connector type.

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